Carbureter.



E. N. BRODERICK. CARBURETER.

PT.9. i908. RENEWED MAR. 1.19I6.

Patented Dec. 5,1916.

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APPLICATION FILED SE 4 WITNESSES: 1

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IN VEN TOR E. N. BRODERICK.

Patented Dec. 5, 1916. 3 SHEETSSHEET 2 mmw INVEN TOR Ernest N. Broderick WITNESSES: 042% a.

A TTORNE x3 E. N. BRODERICK.

CARBURETEH. APPLICATION FILED SEPT.9. I908. RENEWED MAR. 1. 1916.

LQTAWQU Patented; Dec. *5, 1916.

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INVENTOR WW M1 EmQST N Bmderiwk a 0% A9 I A TTORNE v5 duct outlet.

EENEST NTBBOJDERICK, 015 DETROIT, MICHIGAN, ASSIGNOR T0 DETROIT CARBUEETEB. COMPANY, 015 DETROIT, MICIHTGAN, A CORPORATION OF MICHIGAN.

CJBUEETER.

Patented Dec. 5, 1916.

Application filed September 9, 1908, Serial No. 452,225. Renewed March 1, 1916. Serial No. 81,543.

To all whom it may concern Be it known that I, ERNEST N. BRODERICK, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Carbureters, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to carbureters and more especially to means therein for adjustably regulating the air supply.

The invention consists in the matters hereinafter set forth, and more particularly pointed out in the appended claims.

In the drawings, Figure 1 IS a View in vertical section of a carbureter embodying features of the invention. Fig. 2 is a view in section on line m-m of Fig. 1. Fig. 3 is a view in detail of an adjusting screw for an auxiliary inlet port gate. view in perspective, partly broken away, of the carbureter. Fig. 5 is a diagrammatic view of a throttle valve showing it in throttled position with gasolene supply shut off and auxiliary air inlet and outlet closed. Fig. 6 is a diagrammatic view showing outlet opened and auxiliary air inlet closed, in position for starting with gasole-ne supply valve twice the normal height. Fig. 7 is a diagrammatic view showing inlet and outlet both open, as in full speed or normal operating position, the movement being back one-half that of Fig. 6. Fig. 8 is a view inv detail of an adjusting gate for an auxiliary air inlet port. Fig. 9 is a view in vertical section of a carbureter, showing a modification of the fuel valve, and Fig. 10 is a plan view thereof.

Referring to the drawings, 1 indicates a carbureter base and fuel chamber which maybe of any preferred form that has a fuel duct 2 discharging through itsupper end with a main air supply passage 3 having an opening adjacent the discharge mouth of the duct so that air passing in is charged with vapor from the fuel at the forms a float chamber for a float feed valve indicated at 4 with float 5, and the passage 3 is annular and concentric with the duct mouth, both opening through a dished cover 6. A circular casin 7 closed at its upper end is seated on the ase in axial alinement with the duct mouth. An outlet 8 extends Fig. 4 is a As herein illustrated, the base.

through a radial nipple 9 on the casing, which is fitted for connection with the intake of an engine. There is an auxiliary air '12 rotatable in the casing wall, has an auxiliary air inlet port 13 preferably rectangular and outlet p-ort'14 of about twice the length in'extent adapted to register respectively with the auxiliary opening and the outlet in the casing wall, a radial arm 15 with hollow boss 16 extendingthrough a central bearing aperture in a lug 17 on the casing top, with hand lever 18 adjustably secured on the boss affording convenient means for manipulating the valve. The ports are so disposed and of such relative extent that the inlet and outlet may both be closed, as in Fig. 5, both open as in Fig. 7, or the auxiliary opening closed and outlet opened as in Fig. 6.

The size of the opening 10 in the auxiliary air inlet passage may be varied by a segmental gate 19, concentrically secured within the valve 12 in a pair of vertical guides 20, the latter being preferably formed in the front side I of a suitably designed deflector 21 forming the auxiliary air inlet passage over the fuel duct, a semi-circular perforated or gauze screen 22 likewise being secured to the deflector as a distributor and mixer. The deflector being rectangular in cross section and extending at right angles to the fuel opening is adapted to direct a-ir entering the auxiliary inlet past the fuel intake opening insuring a through mixture. The gate may be raised or lowered by an adjusting screw 23 whose flanged head 24 is retained by a flat spring plate 25 held by clamping screws 26 passing through the casing top into lugs'27 of the deflector to prevent the screw 23 from raising in adjusting the gate. The lower oblique edge 28 of the gate affords opportunity for a very fine adjufiment of the auxiliary air supply for the reason that as the throttle valve 12 is moved by the opening as shown in Fig. 4, the area of the opening is increased or decreased as the case may be in direct proportion to the speed of the engine.

'plication of a screw-driver gate 19 over the auxiliary inlet port 13 is so disposed in position relative to the direction of opening of the ported throttle valve 12 which controls the auxiliary air inlet and mixture outlet so as to give increased extent of air supply during full speed.

An upright yoke 29 is adjustably secured by an apertured and split lower arm 30 embracing the casing lug 17, with binding screw 31 on the top of the casing 7, and has an adjustable stop screw 32 clamped by a set screw 33 in'the path of the lever 18 for limiting the throw of the lever or controlling member.

A bushing 34 is non-rotatably secured by a set screw 35 in the upper arm of the yoke 29 in axial alinement with the fuel duct 2, lug 17 and a boss 36 on the deflector. A stem 37 Whose upper squared or polygonal end is non-rotatably reciprocable in the bushing 34, extends through the hollow boss 16 and boss 36, and has a conical lower end 38 adapted to seat in and close the mouth of the duct 2. A cam collar 39 rotatable on the stem is locked with the lever 18 by a pin 40 or other suitable means, and'a thrust ring 41 adjustably screw-threaded on the stem with clamping screw 42, and beveled to mate the cam, is yieldingly held against it by a spring 43in compression between the adjustable collar 54 on the bushing 34 and a stop 44 on the stem. The upper end of the stem is slotted or otherwise adapted for apor wrench, whereby, by loosening the bushing set screw 35, it may be adjusted up or down in the cam ring and in relation to the mouth of the duct 2. By swinging the arm 18, the auxiliary'air inlet, mixture outlet and fuel duct are thus simultaneously and proportionately opened, the yoke stop defining the throw of the cam. The device is intended to operate as follows :In starting the ports are put in the position shown in Fig. 6, the gasolene valve being open twice the usual amount and all theair being drawn in through the bottom of the "carbureter, then by coming back to the position shown in Fig. 7, the normal openingor' full speed position is obtained, the auxiliary air inlet being open and the gasolene supply out down one-half, by turning still furtherto the position shown in Fig. 5, the shut off or throttled position is obtained both ports and the gasolene supply eing cut ofl.

In the modification Figs. 9 and 10, a cylindrical stem 45 is rotatably and longitudinally reciprocable in the yoke arms, hollow boss 16, and deflector bossi36. A split ring 46 clamped on the stem 45 by a screw 47 with pin 48 extending through an aperture in the yoke arm may lock the stem against rotation. It is raised and lowered from the fuel duct by a cam collar 49 adjustablelongitudinally on the stem, having a point or pin 50 engaging a cam slot 51 in the periphery of a bushing 52 on the stem locked to rotatewith the handle lever 18 as by a dowel pin 53. By this arrangement, complete adjustment of all the working parts is afforded whereby the mixture of air and gasolene may be made as desired, and whereby proportionate amounts of each in greater or less quantities are obtained.

By the double ported throttle, a rich mixture for starting a motor may be obtained, and thereafter a running mixture, all by the use of a single lever, while the adjustable gate at the auxiliary air port enables the earbureter to be arranged for high or low speed engines or different sized motors.

Obviously, changes in the details of construction may be varied without departing from the spirit of the invention and I do not care to limit myself to any particular form or arrangement of parts.

What I claim as my invention is 1. In a carbureter, a vaporizing chamber having an air supply intake opening, an auxiliary air inlet and a mixture outlet, means controlling the auxiliary air inlet and mixture outlet, and means having an oblique lower edge adjustably supported on the casing independent of the controlling means for varying the auxiliary inlet.

2. In a carbureter, a vaporizing chamber having an air supply intake opening, an auxiliary air inlet and a mixture outlet, means controlling the auxiliary air inlet and mixture outlet a gate for the auxiliary inlet movable independent of the controlling means for varying the auxiliary inlet and means for securing the gate in any of its adjusted positions independent of the controlmg means.

3. In a carbureter, a vaporizing chamber having an air supply intake opening, an auxiliary rectangular inlet and a ;mixture outlet, a gate reciprocable across the inlet and having an oblique edge, an adjusting screw operating the gate, and a spring clamping plate engaging the screw.

In a carbureter, a vaporizing chamber having air supply and fuel intake openings, an auxiliary air inlet and a mixture outlet, a deflector adapted to direct air entering the inlet past the fuel intake opening, a gate for the auxiliary air inlet opening reciprocable acrosssaid opening, an adjusting screw rotatably secured in the chamber operating the gate, and a spring plate on the chamber engaging the screw.

5. In a carbureter, a vaporizing chamber having air supply and fuel intake openings, an auxiliary air'inlet, a mixture outlet, a deflector adapted to direct airentering the inlet past the fuel intake opening, a gate for the auxiliary air inlet opening reciprocable across said opening, an adjusting screw rotatably secured in the chamber operating Ill the gate, a spring plate on the chamber engaging the screw, and aforaminous dis an auxiliary air inlet, a mixture outlet, deflector adapted to direct air entering the inlet past the fuel intake opening, a gate for the auxiliary opening reciprocable across said opening, an adjusting screw rotatably secured in the chamber operating the gate, a-spring plate on the chamber engaging the screw, and a single closure adapted 'to close the auxiliary inlet and the mixture outlet either simultaneously or independently.

- 7. In a carbureter, a vaporizing chamber having air supply and fuel intake openings, an auxiliary air inlet, amixture outlet, a closure for the fuel intake, a deflector adapted to direct air entering the inlet past the fuel intake opening, a gate for the auxiliary opening reciprocable across said opening, an

adjusting screwrotatably secured in the chamber operating the gate, a spring plate on the chamber engaging the screw, a single closure adapted to close the auxiliary inlet and the mixture outlet either simultaneously or independently, and a single member adapted to operate said closure.

8. In a carbureter, a vaporizing chamber 3 having an air supply intake, a fuel intake, an auxiliary air inlet opening, and a mixture outlet, a closure adapted to close the auxiliary inlet and the mixture outlet either simultaneously or independently, a longitudinal reciprocable non-rotatable closure for the fuel intake. a controlling member operating the auxiliary inlet and fuel intake closures simultaneously, means adapted to support the fuel closure at any predetermined position relative to the fuel intake,

and adjustable means for limiting the movement of the controlling member.

9. In a carbureter, a vaporizing chamber having an air supply intake, a fuel intake, an auxiliary air inlet opening and a mixture outlet, a closure adapted to close the auxiliary inlet and the mixture outlet either simultaneously or independently, a gate for varying the area "of the auxiliary air inlet, means for securing the gate in adjusted position, a longitudinally reciprocable nonrotatable closure for the fuel intake, a controlling member operating the inlet and fuel intake closures simultaneously, means adapted to support the fuel closure at any predetermined position relative to the fuel intake, andadjustable means for limiting the movement of the controlling member.

10. In a" carbureter, a vaporizing chamber having an air supply intake, a fuel intake, an auxiliary air inlet opening and a mixture outlet, means controlling the auxiliary inlet and mixture outlet openings, a closure for the fuel intake having a stem reciprocable in'the chamber, an angularly adj ustable yoke on the chamber in which the closure stem is non-rotatably reciprocable, and a single member adapted to operate the controlling means of the openings and the stem whose movement is limited by the angular position of the yoke;

11. In a carbureter, a vaporizing chamber having an air supply intake, a fuel intake, an auxiliary air'inlet opening and a mixture outlet, means controllingthe auxiliary inlet and mixture outlet openings, a closure for the fuel intake having a stem reciprocable in the chamber, an angularly adjustable yoke on the chamber in which the stem is nonrotatably reciprocable, a cam rotatable on the stem, a ring secured on the stem engaging the cam and coacting therewith to reciprocate the stem, and a member adapted to operate both the means controlling the openings and the cam whose movement is limited by the angular position of the yoke.

12. In a carbureter, a vaporizing chamber having an air supply intake, a fuel intake, an auxiliary air inlet, and a mixture outlet, a deflector for the auxiliary air inlet opening, means controlling the auxiliary air inlet and the'outlet openings, a closure for the fuel intake having a stem journaled in the deflector and chamber, a yoke angularly adjustable on the chamber in which the closure stem is non-rotatably reciprocable, and a single member adapted to operate the controlling means of the openings and the stem whose movement is limited by the angular position of the yoke.

13. In a carbureter, a vaporizing chamber having an air supply intake, a fuel intake,

an auxiliary air inlet, and a mixture outlet, a deflector for the auxiliary air inlet opening, means controlling the auxiliary air inlet and the outlet openings, a closure for the fuel intake having a stem journaled in the deflector and chamber, a yoke angularly adjustable on the chamber, a bushing adjustably secured in the yoke in which the stem is non-rotatably reciprocable, a cam rotatable on the stem, a ring secured on the stem engaging the cam and coacting therewith to reciprocate the stem, and a member adapted to operate both the means controlling the openings and the cam whose movement is limited by the angular position of the yoke.

14. In a carbureter, a vaporizing chamber having a lateral auxiliary air inlet, a lateral outlet, an air supply intake in the base and a fuel intake adjacent thereto forming therewith a spray nozzle, an annular ported throttle valve adapted to close the auxiliary air inlet and the outlet either simultaneously or independently, an apertured boss on the valve extending through a lug on the chamher top above the fuel intake, a deflector opposite the auxiliary air inlet opening, a do sure for the fuel intake having a stem longitudinally reciprocable in ,the deflector and boss, a yoke having a lower arm engaging the casing lug, angularly adjustable thereon, a bushing rotatably adjustable in .an upper arm of the yoke in which the stem is non-rotatably reciprocable, a cam rotatable on the stem between the yoke arms, a ring having longitudinally adjustable engagement with the stem adapted to coact with the camto reciprocate the stem, and a throttle lever secured to the boss and cam Whose movement is limited by the angular position of the yoke.

15. In a carbureter, a vaporizing chamber having a lateral auxiliary air inlet, a lateral outlet, an air supply intake in the base and a fuel intake adjacent thereto forming therewith a spray nozzle, a deflector opposite the auxiliary air inlet opening, a gate adapted to regulate the auxiliary air inlet opening reciprocable in guides on the deflector, a screw adjustably securing the gate, a spring plate engaging the screw, an annular ported throttle valve adapted to close the auxiliary air inlet and the outlet either simultaneously or independently, an axial apertured boss on the valve extending through a lug on the chamber top above the fuel intake, a deflector opposite the auxiliary air inlet opening, a closure for the fuel intake, a stem therefor rotatable and longitudinally reciprocable in the deflector and throttle valve boss, a yoke having a lower arm engaging the casing lug, angularly adjustable thereon, a bushing rotatably adjustable in an upper arm of the yoke in which the stem is nonrotatably reciprocable, a cam rotatable on the stem between the yoke arms, a ring hav ing longitudinally adjustable engagement with the stem adapted to coact with the cam to reciprocate the stem, a throttle lever secured to the boss and cam, and a stop-screw adjustable in the yoke in the path of the throttle lever.

16.- In a carbureter, a vaporizing chamber having air supply and fuel intake openings, an auxiliary air inlet at one side and a mixture outlet at the opposite side of said chamber, means comprising a sleeve having oppositely disposed ports of different lengths for simultaneously controlling the auxiliary air inlet and mixture outlet, means carried'by the sleeve for simultaneously controlling the fuel intake, and means independent of the controlling means for varying the said auxiliary air inlet.

In testimony whereof I aflix my signature in presence of two witnesses.

ERNEST N. BRODERICK. Witnesses:

C. R. STICKNEY,

A. M. DORR. 

